Program Plan: Insert required header Files Create new file PhoneNumber.h. Make a class PhoneNumber and declare extraction and insertion operators as friend to class. Declare three string variable “ areacode ”, “ exchange ”, “ line ” and one character array “ phno ” to get phone number in an array. End header class. Close and save header file. Create new file Phonenumber.cpp. This will contain definitions and modification required in extraction operator ">>". Include header files, must include PhoneNumber.h Overload the insertion operator to display areacode, exchange and line. Make changes the extraction operator definition. use "getline()" function to get input into "phno". The "getline()" function is used to identify psaces also. Use if construct to check various conditions Check for length of input entered which should be 14, use input.clear(ios::failbit) to set failbit. Check that areacode does not start with either 0 or 1, if it does then use input.clear(ios::failbit) to set failbit. Check that exchange does not start with either 0 or 1, if it does then use input.clear(ios::failbit) to set failbit. Check that middle digit of areacode should be either 0 or 1, if not then use input.clear(ios::failbit) to set failbit. If all the conditions are false, this means that input is correct, thus put them into areacode, exchange and line of number object passed through the function. return input end function Make new C++ file for main() function. Include header files, must include PhoneNumber.h. Start main function. Declare an object of PhoneNumber class phone. Display message to enter phone number. Use cin>>phone which will call overloaded extraction operator. Check whether state returned is goodbit(incase failbit is not set in the function) then display phone number else display error. Return and exit. Program Description: Program to get correct input by overloading extraction operator.

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Chapter 13, Problem 13.14E

Program Plan Intro

Program Plan:

Insert required header Files

Create new file PhoneNumber.h.

Make a class PhoneNumber and declare extraction and insertion operators as friend to class.

Declare three string variable “ areacode ”, “ exchange ”, “ line ” and one character array “ phno ” to get phone number in an array.

End header class.

Close and save header file.

Create new file Phonenumber.cpp. This will contain definitions and modification required in extraction operator ">>".

Include header files, must include PhoneNumber.h

Overload the insertion operator to display areacode, exchange and line.

Make changes the extraction operator definition.

use "getline()" function to get input into "phno". The "getline()" function is used to identify psaces also.

Use if construct to check various conditions

Check for length of input entered which should be 14, use input.clear(ios::failbit) to set failbit.

Check that areacode does not start with either 0 or 1, if it does then use input.clear(ios::failbit) to set failbit.

Check that exchange does not start with either 0 or 1, if it does then use input.clear(ios::failbit) to set failbit.

Check that middle digit of areacode should be either 0 or 1, if not then use input.clear(ios::failbit) to set failbit.

If all the conditions are false, this means that input is correct, thus put them into areacode, exchange and line of number object passed through the function.

return input

end function

Make new C++ file for main() function.

Include header files, must include PhoneNumber.h.

Start main function.

Declare an object of PhoneNumber class phone.

Display message to enter phone number.

Use cin>>phone which will call overloaded extraction operator.

Check whether state returned is goodbit(incase failbit is not set in the function) then display phone number else display error.

Return and exit.

Program Description:

Program to get correct input by overloading extraction operator.

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